Veszelyite Mineral Data

Veszelyite Mineral Data +

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General Veszelyite Information

Chemical Formula:

(Cu,Zn)2ZnPO4(OH)3·2(H2O)

Composition:

Molecular Weight = 375.43 gm

Zinc 26.13 % Zn 32.52 % ZnO

Copper 25.39 % Cu 31.78 % CuO

Phosphorus 8.25 % P 18.90 % P₂O₅

Hydrogen 1.88 % H 16.80 % H₂O

Oxygen 38.35 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu_1.5Zn_0.5Zn(PO₄)(OH)₃·2(H₂O)

Environment:

Found with secondary copper minerals.

IMA Status:

Valid Species (Pre-IMA) 1874

Locality:

Moravicza (Vasko) in the Banat, Romania. Link to MinDat.org Location Data.

Name Origin:

Named for A. Veszelyi (1820-1888), Hungarian mining engineer who discovered the mineral.

Synonym:

ICSD 6209

PDF 12-525

Veszelyite Image

Images:

Veszelyite

Comments: Terminated and lustrous crystals of blue-green veszelyite to 0.5 cm in length.
Location: Black Pine Mine, Philipsburg, Granite County, Montana, USA. Scale: Picture size 3 cm.
© John Veevaert

Veszelyite Crystallography

Axial Ratios:

a:b:c =0.9612:1:0.7366

Cell Dimensions:

a = 9.828, b = 10.224, c = 7.532, Z = 4; beta = 103.18° V = 736.89 Den(Calc)= 3.38

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.642(1), 6.96(0.4), 4.489(0.3),

Crystal Structure:

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Ghose S , Leo S R , Wan C , American Mineralogist , 59 (1974) p.573-581, Structural chemistry of copper and zinc minerals. Part I. Veszelyite,, (Cu,Zn)2ZnPO4(OH)3.2H2O: A novel type of sheet structure and crystal, chemistry of copper-zinc substitution

Physical Properties of Veszelyite

Cleavage:

[001] Good, [110] Good

Color:

Blue green, Green, Dark blue.

Density:

3.4

Diaphaniety:

Translucent

Habit:

Equant Grains - Granular material with equel dimensions in x, y, and z.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Vitreous (Glassy)

Streak:

blue

Optical Properties of Veszelyite

Gladstone-Dale:

CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1919,KPDmeas= 0.1907,KC= 0.1971

Optical Data:

Biaxial (+), a=1.618-1.64, b=1.622-1.658, g=1.658-1.695, bire=0.0400-0.0550, 2V(Calc)=38-72, 2V(Meas)=38.5. Dispersion r < v weak to strong.

Pleochroism (x):

greenish blue.

Pleochroism (z):

blue.

Calculated Properties of Veszelyite

Electron Density:

r_electron=3.29 gm/cc
note: r_Veszelyite=3.38 gm/cc.

Fermion Index

Fermion Index = 0.01089
Boson Index = 0.98911

Photoelectric:

PE_Veszelyite= 24.30 barns/electron
U=PE_Veszelyite x r_electron= 79.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Veszelyite is Not Radioactive

Veszelyite Classification

Dana Class:

42.2.3.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.2)where (AB)3 (XO4) Zq · x(H2O)

(42.2.3)Dana Group

42.2.3.1 Veszelyite (Cu,Zn)2ZnPO4(OH)3·2(H2O) P 2₁/a 2/m

Strunz Class:

VII/D.19-30 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.19 - Kipushite - Veszelyite series

VII/D.19-10 Kipushite (Cu,Zn)5Zn(PO4)2(OH)6·(H2O) P 2₁/c 2/m

VII/D.19-20 Philipsburgite (Cu,Zn)6(AsO4,PO4)2(OH)6·(H2O) P 2₁/c 2/m

VII/D.19-30 Veszelyite (Cu,Zn)2ZnPO4(OH)3·2(H2O) P 2₁/a 2/m

Other Veszelyite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Veszelyite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Veszelyite Specimen Label here :

Veszelyite

(Cu,Zn)2ZnPO4(OH)3·2(H2O)
Dana No: 42.2.3.1 Strunz No: VII/D.19-30
Locality:

Notes: